1 /* 2 * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.hotspot; 24 25 import jdk.vm.ci.meta.Signature; 26 27 /** 28 * Describes a method for which the VM has an intrinsic implementation. 29 */ 30 public final class VMIntrinsicMethod { 31 32 /** 33 * The name of the class declaring the intrinsified method. The name is in 34 * <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.2.1">class 35 * file format</a> (e.g., {@code "java/lang/Thread"} instead of {@code "java.lang.Thread"}). 36 */ 37 public final String declaringClass; 38 39 /** 40 * The name of the intrinsified method. This is not guaranteed to be a legal method name (e.g., 41 * there is a HotSpot intrinsic with the name {@code "<compiledLambdaForm>"}). 42 */ 43 public final String name; 44 45 /** 46 * The {@link Signature#toMethodDescriptor() descriptor} of the intrinsified method. This is not 47 * guaranteed to be a legal method descriptor (e.g., intrinsics for signature polymorphic 48 * methods have a descriptor of {@code "*"}). 49 */ 50 public final String descriptor; 51 52 /** 53 * The unique VM identifier for the intrinsic. 54 */ 55 public final int id; 56 57 @VMEntryPoint 58 VMIntrinsicMethod(String declaringClass, String name, String descriptor, int id) { 59 this.declaringClass = declaringClass; 60 this.name = name; 61 this.descriptor = descriptor; 62 this.id = id; 63 } 64 65 @Override 66 public boolean equals(Object obj) { 67 if (obj instanceof VMIntrinsicMethod) { 68 VMIntrinsicMethod that = (VMIntrinsicMethod) obj; 69 if (that.id == this.id) { 70 assert that.name.equals(this.name) && 71 that.declaringClass.equals(this.declaringClass) && 72 that.descriptor.equals(this.descriptor); 73 return true; 74 } 75 } 76 return false; 77 } 78 79 @Override 80 public int hashCode() { 81 return id; 82 } 83 84 @Override 85 public String toString() { 86 return String.format("IntrinsicMethod[declaringClass=%s, name=%s, descriptor=%s, id=%d]", declaringClass, name, descriptor, id); 87 } 88 }